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G. JAEGER' May 20, 1 930, LOADER' AGITATOR FOR CONCRETE MIXING MACHINESOriginal Filed Jan. 8, 1

GEBHARD JAEGER I Remind my 20,19,30-

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or conumnus', onIo, ASSIGNOR-TO rim Juana them COMPANY, OF COLUMBUS,QHIO, .A COBPOBA'IION} OF OHIO Leanna ncrrnroa FOR coNcnErE-mxmsimcnnsms Original 30. 1,714,601,

' In the type of concrete mixer in which the mixing drum is charged bymeans ofa ch'argi ing bucket that is raised on a pivot to discharge itscontents 'of sand, gravel and cement into the drum the flow of suchcontents from the bucket is often so tardy as to neces- I sitatepounding the bottom of the bucket with a hammer, heavy bar or otherconvenient instrument adapted to shake and hasten the material along.Such pounding indents and disfigures the bucket and aggravates .the.

trouble. Means have heretofore been pro posed and patented toautomatically bodily agitate the bucket without such pounding,

hence the object of the present invention is a simplified and improvedmeans for accomplishing a similarresult.

The invention is embodied in the example herein shown and described, thefeatures of novelty being finally claimed.

In the accompanying drawing I Figurel is a view in elevation showing my1 invention applied to a concrete mixing machine in which the mixingdrum is of the mtating but non-tilting type, the view being taken atthat side of the machine containing the charging bucket. Figure 2 is acombined section and elevation on the line- IIII Fig. 1 looking in saidline. a V f Fig. 3 is a detail in section illustrating a portion of thedrum rotating means.

In the views the character 5 designates'the cross bar 12 of a linkingframecomprising" also side bars 13, 13,- and upper crossbar l4,the-latter being pivoted in uprightkf-rame members 15, 15, erected onthe bed 16 of a suitable truck. The bucket'can be raised to position todischarge its contents. into the.

drum through the aforesaid opening 9 by fneans of a pair of cables 18winding on spopls the direction'indicated by the arrows adjacent mixingdrum, itbeing rotated by means of a 7 fasten a suitable shaft 19 drivenby the power shaft 16 through a sprocket chain 20,

suitable clutching devices and means for o crating them being providedto control the times when the bucket shall be raised and lowered. Suchlast described mechanism, ina general way, is now in extensive use andrequires no detailed description here.

The drum is rotated by means of a suitable engine housed in the hood 21,the" power shaft 6 of such engine having a pi'nion 22- driving a largergear 23 havin shaft 25 in a housing 24,'the pinion .7 on saidshaft'25engaging the annular rack 8 as before stated. On said shaft 25 is asprocket pinion 26 extendingfrom which to a large sprocket 27 is thesprocket chain 20 to operate the shaft 19.

.The shaft 25has secured to it a double cam 28. J ournaled' in \thelower portions of the upright frame members 15, 15, is afrock shaft 29secured .to which are two shaker 1 arms 30 arranged in planes includingthe crossbar 12 said side straps are brought into contact with saidshaker'arms30.

One end of therock arm shaft 29 hasse- '1 curedto it one end of acrankarm 31, the other or free end of said arm being provided with ananti-friction roller 31 ada ted to contact with thedouble cam 28 on saft 25, when the arm is depressed; The arm 31 has connected to it a coilspring 32 attached to a fixed bar 33, said spring adapted to hold thearm- 31 removed from operation by. the double cam 28, and theshaker arms30 advanced,'when the bucket is down, but in position to be operated tocause contact of the roller 31 when thebucket approaches'and is in itsdischarging position.

The operation is this The engine shaft 6 and mixing drum are driven inone direction -with a constant motion, the bucket hoisting and loweringmechanism being manually controlled at will as usual. The bucket issupplied with the usual solid ingredients. and

thedrum with water from a tank having a spout as shown at 34. When thebucket is raised to position to discharge its contents into" the drumthe shakerarms 3O arepushe'd' inward thereby depressing theanti-friction rollers of the crank arm into position to be actuated bythe double cam which beingin rapid'rotation vibrates the "bucket on theupper. cross bar 14. Such agitation of the bucket causes the appropriateand substantially complete discharge of the contents of the bucket intothe mixing drum through the opening 9 of the drum. After such adischarge the bucket is lowered and supplied with the necessary freshcharge of solids, it being noted that in the intervals between theelevated positions of the bucket the double cam turns without actuatingthe bucket agitating elements.

The forms of the parts can be changed without departing from the gist ofthe invention as claimed.

What I claim is: t

'1. In a concrete mixing machine having a rotatable mixing drum, acharging bucket therefor, and linking means for thebucket, means foragitating the bucket on its linking means including a crank arm andmeans for oscillating the same, and means whereby said crank arm is heldout of oscillating position until the charging bucket is in drumcharging is in drum charging position.

3. In a concrete mixing machine having a mixing drum, means for rotatingthe drum, a charging bucket for the drum and linking means for thebucket, means for agitating i the bucket on its linking meansincluding acrank arm, and a double cam operated by the drum rotating means foroscillating said crank arm, and means whereby said crank arm is held outof oscillating position until the charging bucket is in drum chargingposition.

4, In a concrete mixing machine having a mi-xin drum, means for rotatingthe drum, a charging bucket for the'drum, and linking means for thebucket,means for agitating the bucket on its linking means including a.cam operated with the drum and acting on the linking means, and meanswhereby said linking means are held out of actuated posiof a rock shafthaving an arm actuated by the bucket, a cam operated with the-drumrotating means, and means whereby said arm is held from operating saidcam until the drum arrives at drum charging position.

6. In a concrete mixing machine having a rotatable mixing drum, meansfor rotating the drum, a charging bucket therefor, means for holding thebucket in linked relation to the mixing drum, means for agitating thebucket when in charging position consisting of a rock shaft having anarm actuated by the bucket, a cam operated by the drum rotating means,and means whereby said arm is held from operating saidcam until thebucket arrives at drum charging position, and means for removing saidarm from saidcam when the bucket retreats from drum charging position.

7 In a concrete mixer having a mixing drum and a pivoted charging skiptherefor,

a pendent mounting for said skip, and means for swinging said skip onits pendent mounting to facilitate the discharge of materials from saidskip into said drum.

In a concrete mixer, a rotatable mixing drum, a pivoted charging bucket,means for pendently mounting said bucket, said bucket movable fromload-receiving position to drum-charging position; and means forvibrating posit1on.

9. In a concrete mixer, arotatable mixing drum, a drum charging bucket,a pendent link mounting for the bucket, means pivoting the bucket toswing on said link mounting; and means operated with the drum forvibrating the bucket in its drum charging position;

10. In a concrete mixer, a rotatable mixing drum; a skip, means forraising the skip from loading to drum charging position, means forsuspending said skip in drum charging posi tion to permit vibrationthereof, and means for automatically vibrating said skip in itssuspended and charging position to facilitate the discharge of the skipinto the drum.

- 1 GEBI-IARD JAEGER.

tion pending the arrival of the bucket at drum charging position.

5. In a concrete mixing-machine having a rotatable mlxmg drum, means forrotating the drum, a charging bucket therefor, means for holding thebucket in linked relation to the mixing drum, means for agitating thebucket when in charging position consisting said bucket whenin'drum-charging

